~snip~
I have to side stompix's opinion here, if you really can't hit the minimum payouts for most pools, you are wasting your time and efforts.
It's not only for older inefficient miners though, you can also run a tiny home silent operation that costs you very little electricity and gives you a couple of bucks a week.
For example you can run an absolutely silent Apollo BTC at 2.1TH/s using 120W only. At any pool it would take you months to get anything, but with NiceHash you can get a few sats every week or two via lightning.
Also, depending on your electricity costs, you can actually make money with this. It's just a small and silent operation at home, you're not necessarily wasting money in certain configurations:
Also, some people might want to basically buy Bitcoin through the electricity bill as well, and nicehash allows this for tiny miners.